ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: arepsa <arepsa@student.42porto.com>        +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/04/12 12:41:04 by arepsa            #+#    #+#             */
/*   Updated: 2023/04/12 12:44:02 by arepsa           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/*copy n size block*/
/*doesn't take NUL char into account*/
/*copies in reverse overlapping blocks (src < dest)*/
void	*ft_memmove(void *dest, const void *src, size_t n)
{
	size_t	i;

	if (!src && !dest)
		return (0);
	if (src < dest)
	{
		i = n;
		while (i > 0)
		{
			i--;
			((unsigned char *)dest)[i] = ((unsigned char *)src)[i];
		}
	}
	else
	{
		i = 0;
		while (i < n)
		{
			((unsigned char *)dest)[i] = ((unsigned char *)src)[i];
			i++;
		}
	}
	return (dest);
}